The Hymax Grip’s patented universal teeth and hydraulic seal grip plastic and metal pipe harder when under stress so joining pipes can move up to 4 degrees on each end without breaking. The result: a watertight tight seal even in extreme temperature changes. Ready to use out of the box, the unit comes as a restraint coupling and as flange adapter for diameters ranging from 4 to 12 in. Installers will appreciate the stab-fit and bold closure designs. Click here to watch a demonstration.